Query GLX_RED_SIZE, GLX_GREEN_SIZE, GLX_BLUE_SIZE, GLX_ALPHA_SIZE and add their values instead of querying GLX_BUFFER_SIZE. (Although the GLX specification says GLX_BUFFER_SIZE is the sum of GLX_RED_SIZE, GLX_GREEN_SIZE, GLX_BLUE_SIZE, GLX_ALPHA_SIZE, this is often not the case.)
Query GLX_RED_SIZE, GLX_GREEN_SIZE, GLX_BLUE_SIZE, GLX_ALPHA_SIZE and add their values instead of querying GLX_BUFFER_SIZE.
(Although the GLX specification says GLX_BUFFER_SIZE is the sum of GLX_RED_SIZE, GLX_GREEN_SIZE, GLX_BLUE_SIZE, GLX_ALPHA_SIZE, this is often not the case.)

This fixes glx acceleration with nvidia and probably other drivers.

jcdubois/DirectFB,sklnet/DirectFB,djbclark/directfb-core-DirectFB,kaostao/directfb,DirectFB/directfb,kevleyski/directfb,dfbdok/DirectFB1,DirectFB/directfb,deniskropp/DirectFB,kevleyski/DirectFB-1,deniskropp/DirectFB,dfbdok/DirectFB1,mtsekm/test,sklnet/DirectFB,lancebaiyouview/DirectFB,mtsekm/test,Distrotech/DirectFB,kevleyski/DirectFB-1,kaostao/directfb,deniskropp/DirectFB,kevleyski/DirectFB-1,kaostao/directfb,sklnet/DirectFB,Distrotech/DirectFB,Distrotech/DirectFB,kevleyski/directfb,lancebaiyouview/DirectFB,kevleyski/directfb,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB,sklnet/DirectFB,dfbdok/DirectFB1,DirectFB/directfb,jcdubois/DirectFB,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB,kevleyski/DirectFB-1,kevleyski/directfb,jcdubois/DirectFB,djbclark/directfb-core-DirectFB,mtsekm/test,deniskropp/DirectFB